Channeling device for sewing-machines.



T. G. PLANT.

CHANNELING DEVICE FOR SEWING MAUHINES.

APPLICATION FILEDJULY 2.7, 1907. RENEWED An. 14, 1909.

940,723,. Patented Nov. 23, 1909.

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GHANNELING DEVICE FOR SEWING MAGHINES.'

APPLICATION FILED JULY 27, 1907. RENEWED APR. 14, 1909.

940,723. Patented Nov. 23, 1909. 2 sEEETs-sEEET 2.

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Specificationof Letters Patent.

Patented Nov. 23, 190.9.

.s ncationmea m 27.1907, Serial 1%. assists ,Ienewed A ril 1 4, 1909. Serial No. 489,888.

To all whom it may concern: I

Be it known that I, THo'MAs G. Brianna citizen of the United States, residing-in Boston, in thecouhtyof Suffolk and :State of Massachusetts, have invented an improve-.1 ment in Channeling Devices'for" Sewings v p fwith a'handle m by whlchlt may be raised Machines, of which the following description, in connection with .the accompanying drawings, is a specification, like lettersonf the drawings representing like parts.

My invention in sewing-machines relates particularly to means for making a slit. 'or cut in the work in advance of the stitch making point to receive the line of stitched as formed, my invention comprising the, combi-: nation of parts hereinafter set forth, 'operating in the manner described.

To enable my invention to be understood,

I will describe the same in connection with.

oneembodiment thereof selected for illustration herein, it being understood, however,

thatmy invention is'not restricted to the particular embodiment shown.

Referring to the drawings: Figure 1, in

vertical section and partial elevation, illustrates a typical sew-1n with one embodiment of my invention. 2 is an enlar ed detail showing the presser foot, 21. part 0% the work support, the awl and needlefviewed from. the opposite side of Fig. 1;Fi'g. 3 is a front elevation of the chine extensively employed in themanu [acture of boots and shoes. The construcnon and operation of suchmachmes 1s so well understood that it is unnecessary to describe the same in detail, it being'sufficient for present purposes to refer only to the principal parts thereof. The feed slide is indicated at c and reciprocated by usual.

means, with a bracket 0 thereon, a short shaft d mounted in the upper end of said bracket supporting the awl carrier (1" and its awl (Z, driven by the segmental gear d fulcrumed at d at the rear of the machine.

machine equip edfi f foot carrying lever, said presser foot being same containing ,a usual shuttle, driven in usual manner. The usual stationary work support is indicated at 5 above which is arranged-the presser foot carrying lever m, fulcrumed upon a stud mfiand provided at will, said-presser foot lever having a tail piece provided with ,a segmental ear in mesh with a pinion m controlle by a spring m whichtends constantly todepress said presser lever to maintain its presser foot in substantially-continuous contact with the work beneath it, resting n" onthe'work support 6 The usual threa finger is typified I The shuttle casei's indicated at 8 Fig. 1, the

at w, the thread locking-means at 39 p and p and the measuring mechanism at m to vary the length of-threaddelivered to the {stitch forming devices in accordance with the thickness of Work operated upon. The usual needle ,is indicated in dotted lines at h, Fig. 1, it bein actuatedin' usual manner. Re. erring to gs. 2, 3 and-4, the presser the-position of the presser foot indicating foot 25' shown se aratel in 4, is suita lil y ably attached-to t e free end 0 'the presser .cut awayet its front side to leave a rear 'wardly .andtransversely extended finger 26,

with an outwardly extended ear 27 at its outer endL-Q The fulcrum stud m forthe presser lever, -Fig. 5., is made tubular to receive a' pin 28 provided at its left hand end, next the presser lever, with an arm 29, which reaches orward into position directly beneath the presser footfio said arm 29. underlying. the aterally extended portion of the presser foot and being itself provided with'a laterall extended finger portion 30 see Fig. 4t) whic is provided at its undensi e with a slitting I knife or device 31.

Between the supporting pin 28 and its free end, said arm 29 is notched as at 32 (see .Fig. 4) to straddlethe-pin or sup ort d forthe awl carrier, said arm sttin 'ng between the awl carrier and the sup orting.

bracket e therefor, the latter being 0 t-away' for the purpose, so that every transverse re" ciprocation of the feed slide, its bracket 'and awl carrier, to cause the awl to feed the".

work, will take with it said arm 29 and its slitting device 3l,'the fulcrum in 28 for said arm sliding endwis'e in t e tubular presser footfulcrum m". 7 Referring again to Fig.5, the pin 28. at

its end opposite the arm 29, is provided with a radial stud 33, which is connected by a spring 34 with some stationary support, said spring tending constantly to raise the arm .29 with its slitting device to hold the latter close against the under side of the presser foot, so that whenever the presser footis Work whereupon the feed slide, upon which the awl carrier. is mounted, is given a feeding movement to the left '(Fig. 3) to cause the awl .to feed the work into position beneath the needle, in order that the needle as it descends may enter the awl hole, the awl being withdrawnin advance of the needle.

When the needle has entered the work and the awl cleared it, the feed slide is returned again to the right (Fig. 3) to its original position, preparatory to the awl again pen etrating the work for the next stitch and, during this return movement, the slitting device is drawn along the top-of the workand slits the same for a distance equivalent to the length of feed, so that when next the awl ismoved-to; the leftto feed the work into position beneath the needle for a new Stitch," the slit previously made by the slitting device follows the last stitch to'its position beyond the needle the slit reachin from the last-stitch to the needle. Thus the I next stitch, as formed, sinks into the slit beneath it and is thereby concealed more or less, according "to the depth and the nature of the cut, and that of course depends largely upon. the character of slittin device employed. By this arrangement it matters not what maybe the length of feed or how often it may be varied, the slitting device by moving always with the feeding awl will produce for each stitch a slit to receive the same and of a suflicient length therefor. It willbe observed that each slit produced by the slit ting device extends from the last stitch formed to the needle so that the slit is always in proper positiontc receive the next stitchformed, even though the work during the feed be turned more or less as, for instance, in following the irregular outline of a shoe sole. This would be impossible if the slitting device in itsmovement always begen at a point'removed from the last stitch ormed and drew farther away. It will be observed, also, that the slit is produced upon I that side or face of the work which is oppo-- site the side or face at which its actuator,

namely,the awl carrier, is located; that is ism, work feeding means to move the work in the line of ,feed, a work slitting device to slit the work for the reception of the" stitches, and means to move the. feedlng means and slittin device together and with the work as'it is fed and to return the feeding means andslitting device to initial position to cause the slitting device to slit the work on such return movement.

2. In a-sewing machine for sewi 0 shoes, the combination of a shaft, stitch i oi-ming mechanism operated therefrom, Y a feeding awl, a work slitting device to slit the work for the reception of the stitches, and means for moving the feeding awland slitting device together and with the work as it is fed and to return the feeding awl and slitting device to initial position tov cause the slitting device-to slit the work on such return movement.

3. In a shoe sewing machine, the combination of stitch forming and awl feeding means, a Presser-foot, an arm carrying a slitting device, said arm being engaged by the presser-foot, and connections between the awl feeding means and said arm to imart movement to the slitting device in the f ine of feed.

4. A- sewing machine comprising stitch forming means combined with a feeding awl; awork slitting device connected therewith, and means to operate the same whereby said awl and slittin device advance with the work as the latter is fed and the slittin device slits the work as the awl is returned for a new feed;

5. A sewing machine comprising stitch formin means, an awl, means formoving the awl work and then return the awl to initial position, a work support, a presser foot-o posedthereto, a work slitting device to sl it the work for 'thereception of the stitches, and connections between the slitting device and awl feeding means to cause the slitting device to move with the awl and work as the latter is fed, and remain in the work and be returned by the awl feeding means to initial position to .slit the work on such return movement.

6. sewing machine comprising, in combination, a work support, arising and fallin .the line offeed to advance the slitting device, and means for recigrocating the slitting device in the line of fee 7. A sewing machine comprising, in combination, stitch forming and work feeding means, a work support, a rising and falling presser-foot, an arm carrying a slitting device, means for imparting-to said arm the rising and falling movements of the presser ioot,-and connect ons between the work feed- 1ng means and said slitting device to impart to the latter movements in the line of feed.

8. Asewing machine comprising, in combination, stitch forming'and work feeding means, a work support, a rising and falling presser-foot opposed thereto, aslitting de: vice underlying -a portion of the presserfoot, means for raising said slitting device as the resser-foot is raised, and means for ing movements in the line of feed.

9. A sewing machine comprising, in com-i bination, stitch forming means, an'awl, means to cause the awl to penetrate the work, a work slitting device disposed adjacent the plane of movement of said awl as it penetrates the work, means to move the aw and slitting device to ether in the line of 'feed and with the work-as the latter'is fed, and to return the awl and slitting device to initial position to cause the slitting device to slit the work.

In testimony whereof, I have'signed my name to this specification, in the presence of two subscribing witnesses.

v THOMAS e. PLi' isr.

Witnesses IRVING U. TOWNSEND, AN'roiNE'r'rn A. BRAUTIGABL- 

